A look at Walmart's attempt to unify its legacy and online store units, causing an internal culture clash, as e-commerce investments pinch the company's margins (Matthew Boyle/Bloomberg)

Matthew Boyle / Bloomberg:
A look at Walmart's attempt to unify its legacy and online store units, causing an internal culture clash, as e-commerce investments pinch the company's margins  —  Not long ago, a Walmart Inc. store manager asked the company's e-commerce department if it could send over the details …